What is the origin of the idiom "flesh and blood" and when to use it?

The origin of the idiom "flesh and blood" can be traced back to ancient beliefs and cultural traditions that emphasized the significance of blood ties and kinship. Throughout history, many societies have placed great importance on the concept of blood as a symbol of family connection and lineage. This idiom likely emerged from these cultural and societal beliefs, reflecting the deep-rooted understanding that family members share a common bond and physical connection through their shared bloodlines. It is often employed when discussing family matters, such as the love and loyalty shared among family members.

What is the origin of the idiom "one's flesh and blood" and when to use it?

The idiom "one's own flesh and blood" is thought to have originated in the Bible. In the Book of Genesis, God creates Adam and Eve from the dust of the ground. They are then described as being "bone of my bone and flesh of my flesh" (Genesis 2:23). It is used to describe family members who are related by blood, such as parents, siblings, or children. It emphasizes the special and irreplaceable nature of these relationships, suggesting a strong emotional attachment and a sense of shared identity.